Feeding mechanism for blindstitch-machines.



L. ONDERDONK.

' FEEDING MECHANISM FOR BLINDSTITGH MACHINES.

APPLIGATION FILED JULY 31, 1902. 1,042,258, Patented 0ct.22, 1912.

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"JULIE; i 'lhlwm. In; -lilfliimm l L. ONDERDONK.

FEEDING M Q AMSM FOR BLINDSTITOH MACHINES.

APPLICATION FILED JULY31, 1902.

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L. ONDERDONK.

Patented Oct. 22, 1912.

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""'H""IHIINIIIIE wi twwoao L. ONDEBDONK, FEEDING MECHANISM FOR BLINDSTITGH MACHINES. APPLIGATION FILED min 311, 1902. 1,%2,25& Patented 00a. 22, 1912.

+- WITNESSES 3 A TTOPNEXS L. ONDERDONK. FEEDING MECHANISM FOR BLINDSTITGH MACHINES.

APPLICATION FILED JULY 3]., 1902.

Patented Oct. 22, 1912.

5 SHEETS-SHEET 5 l/vi humus Lamina onnnnr'onrz, or newsman, 1v. assIenor. tro THE union srnomnsnw ING MACHINE QSMPANZ, or CHICAGQ, ILLINGIS, A CORPORATION or ILLINOIS.

FEEDING MECHANISIKE FOR BLINDSTITCH-MACHINES.

reassess.

Specification of Letters Patent.

Patented Got. 22, 13 12.

Application filed July '31, 1902. Serial No. 117,878.

Mechanism for Blindstitch-Machines, of

which the following is a description, reference being had to the accompanying drawing-and.to the letters and figures ofreference marked thereon. My invention relates to an improvement in sewing 'inachines, and more particularly to a feeding mechanism for a blind stitch sewing machine of the type illustrated in my prior PatentNo. 721,077, granted February 17th, 1903.

The invention, therefore, consistsin the matters hereinafter. described and referred to in the appended claims.

The invention is illustrated in the accompanying drawings'in which- I X Figure 1 is a front elevation of a blind stitch'machine embodying my invention, this figure representing the preferred form of the machine to which my feed mechanism is applied. Fig. 2 is a rear sectional end .view of EPOItlOIl of a machine embodying my invention'. F1g.-- 3 1s a sectional slcle view,

broken away, through the center of the work support: Fig. {i is a plan view, partly in section, illustratingthe feed operating mech anism: Fig. 5 is a detail perspective view of the feed dog and its immediate operating partsz' Fig. 6 is a detail view of thefeed adjusting mechanism: Fig. 7 is a perspective View of the top feed mechanism, detached: Fig. 8 is a vertical section taken through the forward end of Fig. 7: Fig. 9 is a sectional.

the top feed tripping side detail view of mechanism.

Referring to the drawings, the machine shown is of the characber'indicated, and it is not necessary to refer specifically to the needle and looper operating mechanisms, nor to the work support C, except to state that the latter is cylindrical andis arranged to swing uponthe standard A by means of the rock-shaft D and is operated by hand lever E, as" shown for example in Patents 721.077 and 7 21,079 granted to me Feb. 17,;

1.903. This hinging of the work support is 'to allow of the ready insertion and removal of the work.

B is the'goose neck, N the pitnian connecmcnts, one, a lower feed mechanism inclosed wlthin the cylindrical casing or body plate tion from the driving shaft Q, for operating the support G, carrying the needle F, which needle in its movement is guided by the openings 6, on the lower end of the arms a.

D is the throat plate and E the rib over which the goods are crimped.

As above intimated, the feeding mechanism of the machine of the type referredto, Includes two cooperatmg feeding arrange- G and carrying feed dogs which have up and down and forward and backward movements; and the other, a top feed mechanism. Referring first to the lower or main feeding mechanism, two eccentrics g, h, are secured on the main or driving shaft between its two bearing points, which feccen- I tries operate two upright connecting rods 2', 7c, the lower end of connecting rod 2' beingsecured by ball and socket connection to the horizontal lover Z. This lever Z is fixed at its outer end to a shaft m, journaled in bearingsin lugs on the front of the machine standard and I is provided at its forward end with a curved slotted cross-head 'into which is fitted the head of a bolt a. On the bolt n is a ballsleeve 0 held firmly in place by the nut and washer 7), 9. Around the ball sleeve 0, is clamped one end of the connecting ro'd s, the opposite end of nhich has a ball and socket connection, with the crank sleeve '0 fixed to one end of the feed dog actuating shaft 21. which extends through the cylindrical bed plate,having suitable bearlog lugs therein, and at its forward end is a secured to a head -18, having a longitudinal slot 49 in its lower end, through which passes a pivot pin, 50, having a squared head 51, to the outer cnd of which pivot pin, is attached the lower end of the feed dog carrying bar 52, having feed dogs 53,- which feed dog carrying bar 52 is pivotally attached to one end of the arm 54, fixed to the outer end of the shaft to by which the vertical movements are imparted to the feed dog, the bar 52, sliding up and down the link 54 oscillates.

he eccentric connection 2' through the lover Z, shaft m with slotted crosshcad, bolt a,.slcevo 0 connecting rod 8 and sleeve t form a universally jointed arrangement of parts,

- from which'a conveniently adjustable oscillating movement is imparted to the feed shaft 2/. during the revolution of the eccentric g, secured to the driving shaft. It 18' this oscillation of shaft a, which determines the length of stitch, the variation of oscillation of said shaft being etiecteol by the transverse shaft on.

The lower end of connecting rod is, is'

secured by a ball and socket connection to the bell crank lever w, vSaid hell crank lever 00 is secured on the transverse shaft m, ournalod in hearings in lugs extending from the rear side of the machine'standard, the lugs being represented at y, c. To the lower end of m is secured. by ball and socket connection the connecting; rod 3. The other end oi the connecting rod 8 has a hall and socket con nection with a crank sleeve w, which is firmly secured to the feed shaft it, through which connection oscillatory motion is imparted to the shaft u from the driving shaft The purposeiot the adjustable connection between the hell crank lover a" and the connecting rod 8' is to increase or 'di minish at will the up and down movement of the feed dog, which is particularly desirable in a machine of this kind, to meet the variations in thickness and nature of the material, tobe sewn. Also by the ball and socket connection of parts, it will be seen that the cylindrical work support ,or body pate may be dropped or raised more or 'ess without affecting the action ot the shafts u, u and therefore the tced dog and the connecting parts will notchind. ilhusn. universal connection is provided at one end of the feed dog shaft, between it and its operating shaft. I i

The numerals 55 and 56 represent two feed dogs having; teeth in their lower torward edges projecting, one, 55., into the space between the presser feet of the u1achine, and the other extending alongside, one of said presser feet, which presser feet for the sake of clearness, are not shown. These feed dogs 55 and 515 are fixedly sleeved at the front of the machine to a shaft 59 extending longitudinally of the work support, said shaft being journaled in ihe upper ends of arms 60, (30, fixed at their lower ends to the rock shaft 61 ournalcdf in hearings in a lug; 62, secured to the work support.- This rock shaft is provided with 'an arm' 63, in which, near its upper end, is fitted a bolt G l, upon which is pivoted one end of a link 65, which at its opposite end is pivoted on a bolt 66, secured to the upper end of the arm 67, which latter is clamped upon the shaft u.

It will be seen, therefore, that asthe shaft u oscillates, the shaft 6i rocks, and. swings the arms 60 bodily, thus moving the feed dogs 55 and 56 bodily back and forth. Near its inner end, the she rt 59 has looselyniounb ed upon it the downwardly projecting 'arm 68, which, at its lower end is provided with as they form the sub ect matter of J eas es the stud 69, upon which is pivoted. one end of a curved link 70, which, at its lower end is pivoted on the stud 71, secured in the lower end of the lever or crank 72 loosely sleeved on the shaft u. This lever or crank 1 2, is normally pinned to the crank 73 fixed at its upper end to the shaft or, This pinning together of "the two cranks is accomplished by means oted to the crank 73, and having a latch en-- gaging the slot '75 in the crank '32. I When the cranks 72 and73 are pinned to gcther, they move as one and the oscillations of the shaft a cause the arm {i i to oscillate. A leaf spring 76 is secured. in the split end of the shaft 59 and at its free end rests between projections on the arm 68. The swingingot the arm 68 will therefore, through the fleet spring 76, cause the shaft 59 tooscillatc and impart yielding up and down. movemeohto the feed dogs and 5G.

This yielding connection between the shaft 539 and its operating mechanism, allows the feed dogs to yield to varying thicknesses of material. hen however, the spring catch '74; is relcosezh, the top teed dogs may be readily swunghy hand up and down.

To provide for the automatic release of the top feed niechanisin, when the work plate is lowered for the insertion or removal .f the work, the spring catch 'l'l, has its lower end projecting downwardly into position to'be engaged by a projection on the machine standard, whereby when the work support fis lowered, the catch will be dropped, and release the crank 72 from engagement with the crank 73, holding the catch in disengaged position, until the work support returns to elevated position, and the shaft or begins to oscillate wheuthe cranks are again united.

The numeral 78 represents the curved arm or stop, movable with the feed to preventrelative movement of the body plate and head of the machine, when the needle is inthe work, but this forms no part of the present invention.

The details of the top feed mechanism herein shown and described are not claimed, patent of April 18th, 1911, No. 990,160.

Various minor modifications and changes in the construction of the parts of this apparatus may be made without departing from the spirit of my invention.

Having thus described my inventiori, what I claim as new and desire to secure by Letters Patent, is

1. In. a hlind stitch sewing machine, having a suita lo work supports'movable to allow insertion and removal oi the world, needle and looper mechanism arranged and operating above the work support, a rosin feeding; mechanism, arranged Within the work support, and a top feed mechanism or of a spring catch 74., piv- Eli said work supportfor suppog'ting said top feed mechanism; substantially as described.

2. In a sewing machine, the combination with a work support, meansfor raising and lowering thework support, a main feeding mechanism located within the work support, a top feeding mechanism carried by the work support, and means whereby the top feeding mechanism may be moved from engagement with the fabric when the work support is lowered.

3. In a sewing machine, the combination with a work support, means for raising and lowering the work support, a main feeding mechanism contained within the work support, a top feeding mechanism earned by the work support, connections between the main feeding mechanism and top feeding mechanism, whereby the top feeding mechanism isoperated in unison with the main feeding mechanism, and meanswhercby the top feeding mechanism may be moved out of engagement with the fabric when the work support is lowered.

4. In a sewing machine, the combination of a work support, means for raising and lowering said work support, a main feeding mechanism, a supplemental feeding mechanism, means for operating the supplemental feeding mechanism, and means for disconnecting the supplemental feeding mechanism from its operating means, operated by the lowering of the work support, substantially as described. f

"C In a sewing machine, the combination with the main feeding mechanism, a work support, means said work support, a top feeding mechanism including a plurality of feed dogs, means for imparting a yielding up and down movement to said feed dogs, whereby said feed dogs may yield to varied thicknesses of ma terial, and means whereby thetop feeding mechanism may be lifted from the fabric when the work support is lowered.

6; In a sewing machine having a work support, means for raising and lowering the same, a feed dog, an oscillating shaft for transmitting an oscillatory movement thereto, means for, oscillating shaft, compris ing a driving shaft arranged transversely said oscillating shaft, aneccentric on driving shaft, an eccentric connecting rod, a lever attached to the connecting rod, a rock shaft to which the opposite end of said lever is attached, and connections between said rock shaft and the feed dog shaft, and means for adjusting said connections.

7. In a sewing machine v I support, means for raising and lowering the said top feedmecha prising for raising and. lowering having a work to same, a feed dog, an oscillating shaft for transmitting an oscillating movement thereto, means for oscillating said shaft, comprising a driving shaft, arranged transversely of said oscillating shaft; an eccentric on said driving shaft, an eccentric connecting rod, a lever attached to the connecting rod, a rock shaft to which the opposite end of said lever is attached, and connections between said shaft and the feed dog shaft, said connections including a universal connection at one end of the feed dog shaft.

8. In a sewing machine support, means for raising same, a feed dog, an oscillating shaft for transmitting an oscillatory movement thereto, means for oscillating said shaft, comprising a driving shaft arranged transversely scf said oscillating shaft, an eccentric on said driving shaft, an eccentric connecting rod, a lever attached to the connectrod, :1 rock shaft to which the opposite end. of said, lever is attached, and connections between said rock shaft and the feed dog shaft, said connections having a. uni versal connection at one end to said rock shaft, and at the opposite end having crank connection. with the feed dog shaft.

9. In a sewing machine having a work support, means for raising and lowering the having a work same, a feed dog an oscillating shaft for tffiIlS'fiHitlDg an. oscillatory movement thereto, means for oscillating said shaft, 'coma driving shaft arranged transversely'of said oscillating shaft, an eccentric on saiddriving shaft, an eccentric connecting rod, a lever attached to the connecting rod, a rock shaft to which the opposite end of said lever is attached, and connections between said rock shaft; and the feed dog shaft, said connections including a member adjustably connected at one end to said, rock shaft, and at its opposite end connected with the feed dog shaft.

10. In. a sewing machine having feed dog raising and lowering shaft, a feed dog supported thereby and means for oscillating said. shaft, comprising a driving shaft arranged transversely of said oscillating shaft, an eccentric on. said driving shaft, au eccentric connecting rod, a lever attached to the connecting rod, and a rock shaft to which the opposite end of said lever is attached, and connections between said rcclr shaft and the feed dog raising and lowering shaft, and means for moving said feed dog back and forth to feed the fabric.

11. In a sewing machine having a feed supported thereby and means for oscillating said in ged trai'isversely of said Oscillating shaft, iccentric connecting rod, a lever attached the connecting rod, and a rock shaft to which the opposite end of said lever is at dog raising and lowering shaft, a feed dog and lowering the shaft, comprising a driving shaft-'ar-- tached, and connections between said rock shaft and the feed dog raising and lowering shaft, said connections including a member connected at one end to said rock shaftand at the other end to the feed dog raising and lowering shaft, and means for moving said feed dog back and forth to feed the fabric.

12. In a blind stitch sewing machine having a work-support, an. overhanging frame supporting a needle and looper mechanism above the outer end of the work support,

said support being movable to allow the inserticn and removal of the werk a main feeding mechanism including two oscillating shafts contained within said Work s'ippoi't and a top feed mechanism mounted exts riorly of said support, but opei'atively connected to said shafts within said support" 13. In a sewing machine having a wrlm support, an overhanging frame supporting a needle and lcoper mechanism above the outer end of the work: support, said support being movable to allow the insertion and removal of the Work, a driving shaft arranged transversely thereof, a oscillatory feed shaft within the Work support, an eccentric connecting rod, a lever attached to disconnecting rod, a rock shaft to which the opposite end of said lever is attached, and connections between the reek shaft and said feed shaft, whereby the latter is oscillated.

Iii testimony whereof I aiiix my signature in presence of two witnesses.

LANSING ONDERDONK.

I Witnesses W. L. SWIFT, MILLARD VAN WAGNER. 

